I don't think it will have any problems running SL, Jim.
I don't know if Daryl has the older Mac Mini at 1.83GHz or the newer one, but this thread was about the older one and the poster was happy, as predicted.
Thanks for the link. That is the exact model of my mini. Given the way it is used it sure looks like it will be no problem with SL, and if there are any noticeable performance degrades I will certainly up grade the memory. It is a great little machine for what we do.